MAIN SAILS - Cross-Drive 

Dear viewer, having been in the Sailing Industry for 27 years, I work with Doyle, North and UK Sail Lofts internationally, as well as a few local lofts scattered around the world.

Purchasing a specific sail for your boat is a personal transaction and you need to feel confident with the advice you you are receiving.  I always work closely with my client and the company who builds the sail.

The expertise and services I personally offer are the re-cutting, re-designing, measuring and installation of a new or existing sail or suit of sails.  If there are any furling, reefing or rigging faults, these I normally pick up when inspecting and measuring and will advise of any upgrades or changes necessary or available.

GRAND-PRIX / RACING SAILS

These I normally refer to Mark Plough who owned a UK Sail Loft and now has 4 Sail Lofts on the East Coast (USA) including a Doyle Sail Loft in New York. His Name, reputation and expertise in this field is unsurpassed. He is also a really nice man who runs an awesome business and always has time for interesting projects.

For hand leather finishing, or a molded full batten main that slides on a double track system for a 110 foot mast you are welcome to speak with me regarding your custom design requirements.

 
 Double Taffeta               Cross Drive              Tape Drive               Radial Cut              Down Wind            Std.Dacron

Double Taffeta               Cross Drive              Tape Drive               Radial Cut              Down Wind            Std.Dacron

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Cross-Drive / Cruising Mainsail

Cruising Cross-Drive Carbon-  fully-battened mainsail with grey taffeta on both sides of the sail. The genoa uses the same construction. Click to enlarge. 

Cross-Drive is a two-part construction system. As the diagram shows, the sail is made from a light weight material cut into cross-cut panels that, when put together with broad seaming, achieve the 3-D shape created by the sail designer. Next the sail is reinforced with a grid of narrow high-strength, low-stretch tapes that are bonded to the sail 11 at a time in an 8 inch (20 cm) wide path.  

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Cross-Drive Silver

Description:

Loadpath tape-reinforced sail construction for performance cruising and club racing. Allows for an all white appearance.

Boat size: 
20-40 feet

Construction: 
Extra lightweight cross-cut laminate panels reinforced with continuous corner-to-corner single yarn tapes.

Material:
Glass fiber loadpath yarns applied 11 at a time along the sail’s computer predicted loadpaths. Glass fiber yarns have more stretch than carbon but are less expensive.

Shape Stability:
★★★

Durability:
★★★★

Shape after 500 hours:
Circa 70%

Holds Its Shape

Cross-Drive construction system uses continuous high-strength low-stretch yarns to support the sail’s flying shape.

Hundreds of closely-spaced yarns are bonded to the sail’s surface for maximum strength and shape-holding. 

Innovative tape laying machine allows up to 11 narrow single-yarn tapes to be applied at once in a 20 cm wide path.

With so many tapes running across the sail, the sail has incredible strength and stretch resistance.

Cost Effective

The cost of the sail is also controlled because the sail surface can be made out of an less expensive, lightweight laminated material, whose only job is to give the sail its 3-D shape.

All the sail‘s strength comes from the dense grid of continuous, high-strength yarns that are bonded to the sail‘s surface. 

Since the yarns run across the shaping seams, the seams are locked in place and cannot distort.

Due to the dense coverage of fibers, the sail is completely supported, which results in a smooth sail without distortion.

  A full batten cruising mainsail with two rows of reefs made with carbon Cross-Drive. Notice the extra taffeta layer on the leech that increases longevity to prevent hinging damage induced by luffing.

A full batten cruising mainsail with two rows of reefs made with carbon Cross-Drive. Notice the extra taffeta layer on the leech that increases longevity to prevent hinging damage induced by luffing.

The five layers (taffeta, film, load-path yarns, second film layer, taffeta) are dropped into a variable geometry thermo- form in which the sail is heated and UV-bonded under vacuum pressure to become a one-piece finished membrane.

Not coating the yarns with glue makes for lighter (by 15-30%), more flexible, and more durable sails, which makes happier foredeck teams and happier owners who are not replacing their misshaped and broken sails as often.

Yes, there are seams in a double taffeta  sail, but they are there simply to shape the film layers.

Unlike most high-tech sails in which structural yarns only run the width of an individual panel, a double taffeta sail’s continuous yarns eliminate seam loads, load-induced seam distortion, wrinkles, or worse yet, seam failure. These sails are smooth and wrinkle free.

  For stats on Cross-Drive Carbon please contact us.

For stats on Cross-Drive Carbon please contact us.


Extra Durability With Taffeta

While very strong,  Taffeta sails are made more durable with the addition of a finely woven polyester taffeta layer laminated to one or  both sides. The taffeta layers don't add strength to the sail, but they protect the film layer from abrasion, which is a great benefit for cruising sailors. Taffeta comes in white or grey. 

Available with:

  • Reefs

  • Loose Foot

  • Cunningham

  • Telltales

  • Draft Stripes

  • Sail Numbers

  • Leech-line Options

Battens:

  • Power-head

  • Full Battens

  • Furling Mains

Other Options:

 

  • Lazy Cradle

  • Lazy Jacks

  • Dutchman

  • Sail Cover


Foil Shaping / sail fabrication

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Once the size and boat weight has been calculated  the foils for a given wind condition is then formulated and integrated into the mold for the sail.

Down wind sails have a different shape to up wind etc. 

Batten designs  and  pocket forms to fit existing hardware is incorporated into the lamination and fabrication of the sail.

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Stitching sails and finishing 

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All sail are stitched at some point or in their entirety. Keeping ones machines well tuned is a function of the loft machine mechanic. As this is a dwindling business there are fewer and fewer machine mechanics. So much so that the manufacturers of the sewing machines do not have service departments or personnel to tune the machines. I have had to learn the machine I have owned and operated in order to keep staff working. this normally means 1-2 hours ever night checking the machines after staff have left.

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HeAD BOARDS

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The  headboard is one of the most important parts of your sail.

If the angle of attack for the halyard is not set correctly you main will loose its shape and function incorrectly. 

I like to inspect the mast head, stand off and shiv set up when measuring for the sail. Maximizing the efficiency of a sail is paramount to the functionality a sail offers. 


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These links take you back to the individual design information pages

 



SJC MARINE

 by

Dillon Francis Oberholzer

 

Having owned and worked in leading American Marine companies until 2015 Dillon Oberholzer sold his businesses and moved from the USA  to Guatemala to further his work in Marine Bacteria Remediation. 

This in turn led to the development of SJC where his skills have been put to the test in incorporating modern  state of the art  manufacturing processes integrated with local hand woven products, all protected with "BMS"  Bio -Static, Anti Microbial, water resistant finishes.

Our CAD and technical abilities allow our clients to order products online within fabrication tolerances of 1 mm per 10 meters of final product manufacture.

Precise - On Time - Economic Solutions

 

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